1. to protest against pollution in the country
2. (i) nasal sanitiser products
(ii) face masks
(iii) canned air
3. Seoul recorded the second-worst air quality in the world in March.
5. (i) Beijing
(ii) cooking habits
6. (i) NG (ii) T (iii) F
8. They refused to use less air conditioning, so more coal power was needed to keep offices cool.